Multiple die-stock.



W. V. BULMAN.

Patented Aug. 6, 1918'.

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Patent ed Aug. 6, 1918.

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W. V. BULMAN. MULTIPLE DIE STOCK.

APPLICATION FILED APR-18. 191a.

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g I (I in! IL s sraans BAT g1 FFC I v WILLIAM V. BUL MAN, F PHILADELEH IA, PENN YLVANIA.

MULTIPLE DIE-STOCK.

Specification of-Letters Eatent. Patented Aug, 6 1918,

Application fiieaa ru s, 191s. sci-mine. 229,29 4.

To all whom it may concern:

Be it known that I, WILLIAM V. BULMAN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Multiple Die-Stocks; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which forms. part of thi specification.

This invention is an improvement in die.

stocks for usein threading pipesor bolts; and its object is to provide a stock adapted to contain a number of dies, any one of which may be immediately brought into use by merely properly positioning the stock.

The advantages ofthe invention are the saving of expenseby providing one die stock which is capable of doing the work of four ordinary die stocks; the saving of time by providing four or more sets of dies in one head or stock, each ready for immediate use as desired; the saving of annoyance and labor by mounting a number of sets of dies on one stock, to which they are securely attached and always ready for use, thus avoiding the frequent loss or misplacement of parts occasioned with the ordinary die cutting outfits in which a series of detachable interchangeable dies are to be used with 'one stock, and each time that a different sized thread is to be cut one set of dies has to be removed from the stock and the proper set of dies attached thereto.

My invention provides a simple, conven- 'ient and useful multiple die stock, and I will explain the same in detail with reference to the accompanying drawings which illustrate one practical embodiment of the invention; which I do not consider restricted to the specific form or construction of parts carry four sets of dies; two on one side and two on the other. The two sets of dies on each side of the stock are arranged parallel and separated by' an intermediate spacing rib; and the sets of dies and rib on one side of the stock-are'arranged at right angles to the sets-of dies and rib on the opposite side thereof; and the rib at one side of the stock is provided with guide openingsfor the rod orpipe to be threaded'by the dieson the opposite side of the-stock.

For the sake of explanationIfwill refer to the side ofthe stock shown in Fig. l'as the up'persid'e; and theside of-the stock shown in:-Fig.' 2 as'the underside of the stock. These two sides are substantially alike. -1l f i The upper side member l of the stock is approximately rectangular in plan and is preferably formed or cast integralwith the other parts of the stock; said side is provided with parallel guides orchannels 1 and 1 for the reception of sets of dies D and D which are fastened't-o the top by means of tap bolts 2 and 2 andmay be adjusted toward orfrom each other by means of tap bolts 2' and 2 tapped through endlugs 1 and If at the outerends of the slots l and 1 respectively. "The central portion or rib 1 between the guide channels is provided with'perforations, l and-1' a purpose hereinafter explained, 1

The under side member 30f the stock is substantially similar to the upper sidel and is parallel-therewith and spaced therefrom but integrally connected therewith byyend walls or members '5. The side member 3 is provided with exterior guides or channels 7 '95 D and D which are attached to side 3 by 3 and 3 for the reception of sets of dies tap bolts 4 and 4?, andwhichmay bQItLCljusted by means'of bolts 42 'and 4 tapped" through lugs 3 and 3 on the member 3 at i the ends of the slots. The intermediate portion or rib 3 between the guide channels is provided with perforations 3 and 3 It will be seen' that" the sets of dies D and D and intermediate rib 1 of side memher 1, extend at right angles to the sets of dies D and D and intermediate rib 3 of side member 3. The openings 1, 1 in rib 1 are respectively in axial alinement with the operative faces of the sets of dies D and D while the openings 3 and 3 in the rib 3 are respectively in axial alinement with the operative faces of the dies D and D so that to position the die stock on a rod or pipe to be threaded it is simply necessary to slip the end of the rod or pipe vthrough the proper opening opposite the die Which is to be engaged therewith. The side members 1 and 3 are the opposite sides of a block provided with suitable openings for the passage of the rods or dies, the inner portions of the block being cored out for th DulPOse of lightness so as to prac tically separate the members 1 and 3; but all parts of the stock are preferably cast integral. To further strengthen the end members at the points where the bolts 2, 2 and 4;, {i are engaged therewith I provide studs or Web portions 6 With Which the said tap bolts can be engaged.

The end Walls b may be provided With projecting handle-portions or members 5= Which may be interiorly threaded for enag en h handl ro s of any su able kind by which the stock can be r0- tated to cause any die to operate on the rod or pipe with which it is properly engaged.

the stock; and it is capable of performing the ork of four ordinary die stocks. Each set of dies is preferably for a different size of Work, and any set of dies can be a ly engag d with the ork y m ely properly positioning the stock.

What I claim is:

1. In a multiple d e stock; opposite spaced side members. each having parallel die chan nels and a rib on its outer face; the channel and rib on one member extending at right angles to the channel and rib on the opposite member; dies in said channels; the rib on one member having openings for positioning a rod P pe in Prope relat n t th i on he pncs member- 2. Inmultiple die stock; opposite spaced side memb rs ea a ng llel'e le Ghannels for dies on its outer face and a spacing rib; the channels and ribs on one member extending at right angles to the channels and rib on the opposite member; and dies in each channel; the spacing rib on one memher having openings for positioning a rod or. pipe in proper. relation to the dies on the opposite member.

3. In a multiple die stock; opposite spaced members each containing parallel die chan- Gonies of; this patent may be obtained for five cents each, by addressing Washington, D. 0.

All four sets of dies remain attached to nels on its outer face separated by an intermediate spacing rib; an adjustable set of dies in each channel; the channels and rib on onemember extending at right angles to the channels and rib on the opposite member; and the spacing rib on one member having openings for positioning a rod or pipe in proper relation to the dies on the opposite member; and means rigidly un1t1ng said side members and spacing them properly apart. 1

4. In a multiple die stock; opposite spaced side members each having parallel die channels and rib on its outer face, the channel and rib on one member extending at right angles to the channel and rib on the opposite member; dies in said channels; the rib on one m ember having openings for positioning a rod or pipe in proper relation to the die on the opposite member; end members rigidly uniting said side members and spacing them properly apart; and handle parts on said end members. v

5. In a multiple die stock; opposite spaced side members each having parallel channels for dies on its outer face and a spacing rib, the channels and rib on one member extend ing at r gh a gles o t c hann l a d rib intermediate spacing rib or bar; an 'ad justable set of dies in each channel, the channels and rib on one member extending at right angles to the channels and rib on the opposite member; the spacing rib on one member having openings for positioning a rod or pipe in proper relationto, the dies on the opposite member; studs rigidly uniting said side members and spacing them properly apart; bolts securingthe dies to the members and tapped into said studs; and Y handles attached to said St ck.

In testimony thatI claim the foregoing 1 as my own I al'llX my signature,

WILLIAM V. BULllIAN.

the Commissioner of Patents. 7 

